InChI=1/C21H21FN2O2/c1-23-21(25)18-8-4-16(5-9-18)13-24(15-20-3-2-12-26-20)14-17-6-10-19(22)11-7-17/h2-12H,13-15H2,1H3,(H,23,25)/f/h23H 1863D578338ABF9D